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Short answer in regards to the 8V-71 to 6V-92 swap, about the only difference you will see is the -92 series if it is turbocharged will keep climbing after the -71 series has had to downshift. Since both engines are about the same displacement and rated HP you will notice very little difference in fuel use.
The easiest swap would be to put a turbo onto the 8V-71.
I personally like the -71 series better than the -92 series, particularly in coaches. The -71 series will overheat but not as soon or as often as the -92 series engines.
If we are talking an inline 6-71, it would most probably not fit. It is too long to fit in an MCI engine compartment. Some MC-5 models came with the 6V-71 engine. It was more than just a little bit doggy. The same bus with an 8V-71 would really move out.
You can put a Road Ranger into an MCI but the shift linkage will never be very tight. A company in the Portland, OR area did put a 13-speed RR into an MC-8 with an 8V-71. That bus would blow past almost every other bus going up to the ski areas, including 8V-92 and Series 60 equipped buses.
The question you have to ask yourself is what are you trying to accomplish? Finding a coach with a good power package to start with is going to cost you a whole busload of cash less than any coach you have to swap power packages. Also, unless your significant other is never going to drive or really likes shifting, I would go with an automatic.
Mark O.
Castle Rock, WA |
RV and bus conversion info since 1996.
email Mark O.
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